We will see that, according to Theorem REF , the
non-abelian chief factors \(A\)  of \(G\)  of order \(n\)  fall into at most
two isomorphism classes. We also note that a non-abelian chief factor can be counted in \(\operatorname{rs}_n(G)\)  for different values of \(n\) , if the corresponding primitive group has core-free maximal subgroups of different indices. Furthermore, a non-abelian chief factor of order \(n\)  that is counted in \(\operatorname{ro}_n(G)\)  can also be counted in \(\operatorname{rs}_n(G)\)  if the primitive group associated to the corresponding chief factor has a maximal subgroup complementing its socle (see [1]} or [2]}),
